When we go to bed for about 15-20 minutes will begin to fulfill your sleep. Sleeping patterns are broken down according to the characteristic brain waves into stage 4 when the sleeping brain waves is a stage 1 and a lighter just 45 minutes later, the guests into stage 4 sleep, which is the most deep. After about 45 minutes into the stage 4 sleep into the REM (Rapid Eye Movement) range and return to the original format each night will come again in this cycle by 5-6 after the prolonged REM stage 3 and 4.
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